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Spin Transfer in Exclusive Lambda Production from pp Collisions at 3.67 GeV/c

DISTO Collaboration·F. Balestra·Y. Bedfer·R. Bertini·L. C. Bland·A. Brenschede·F. Brochard·M. P. Bussa·V. Chalyshev·Seonho Choi·M. Debowski·M. Dzemidzic·J. -Cl. Faivre·I. V. Falomkin·L. Fava·L. Ferrero·J. Foryciarz·V. Frolov·R. Garfagnini·D. Gill·A. Grasso·S. Heinz·V. V. Ivanov·W. W. Jacobs·W. Kuehn·A. Maggiora·M. Maggiora·A. Manara·D. Panzieri·H. -W. Pfaff·G. Piragino·G. B. Pontecorvo·A. Popov·J. Ritman·P. Salabura·F. Tosello·S. E. Vigdor·G. Zosi
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Abstract

We report the first polarization transfer measurements for exclusive hyperon production reactions. The normal spin transfer coefficient DNN for pp -> p K+ Lambda is large and negative for forward Lambda production at a beam momentum of 3.67 GeV/c, a result qualitatively consistent with expectations for a mechanism dominated by kaon-exchange and rescattering. The sign of DNN is opposite to that observed in the fragmentation regime for inclusive Lambda production at much higher energies.

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DISTO Collaboration, F. Balestra, Y. Bedfer, R. Bertini, L. C. Bland, A. Brenschede, F. Brochard, M. P. Bussa, V. Chalyshev, Seonho Choi, M. Debowski, M. Dzemidzic, J. -Cl. Faivre, I. V. Falomkin, L. Fava, L. Ferrero, J. Foryciarz, V. Frolov, R. Garfagnini, D. Gill, A. Grasso, S. Heinz, V. V. Ivanov, W. W. Jacobs, W. Kuehn, A. Maggiora, M. Maggiora, A. Manara, D. Panzieri, H. -W. Pfaff, G. Piragino, G. B. Pontecorvo, A. Popov, J. Ritman, P. Salabura, F. Tosello, S. E. Vigdor, G. Zosi. 1999-06-23. Spin Transfer in Exclusive Lambda Production from pp Collisions at 3.67 GeV/c. https://doi.org/10.1103/physrevlett.83.1534

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